Thung Saliam (Thai: ทุ่งเสลี่ยม, pronounced [tʰûŋ sā.lìam]; Northern Thai: โต้งเสลียม, pronounced [tôːŋ sā.lǐam]) is a district (amphoe) of Sukhothai province, in the lower north of Thailand.

[1][2] Neighboring districts are (from the north clockwise): Si Satchanalai, Sawankhalok, Si Samrong and Ban Dan Lan Hoi of Sukhothai Province, and Thoen of Lampang province.

[4] Its name Thung Saliam literally means "field of Indian lilacs", because there used to be this kind of mahogany that used to grow abundantly in the area.

The district is divided into five sub-districts (tambons), which are further subdivided into 59 villages (mubans).

The sub-district municipality (thesaban tambon) Thung Saliam covers parts of tambon Thung Saliam, and Khao Kaeo Si Sombun the entire sub-district of the same name.